matthies



2 Sheets-Sheet 1 J. MATTHIES.

(No Model.)

GAS ENGINE.

Patented Sept. 24, 1889.

0 1 u n M b 7% 0 cc 6 fin a d .r 9 \l 0 1w In 39 a E (No Model.) 2 Sheets-Sheet 2. J. MATTHIE'S.

GAS ENGINE.

No. 411668. Patented Sept. 24, 1889.

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PATENT OFFICE.

JULIUS MATTHIES, OF BERLIN, GERlVIANY.

GAS-E NGINE.

SPECIFICATION forming part of Letters P atent No. 411,668, dated September 24, 1889.

Application filed November 14, 1888. Serial No. 290,801. (No model.) Patented in Germany March 29, 1888, No. 45,449.

To all whom it may concern:

Be it known that I, JULIUS MATTHIES, of Berlin, in the Kingdom of Prussia and Empire of Germany, have invented a new and useful Improvement in Gas-Engines, (for which I have obtained patent in Germany, dated March 29, 1888, No. 45,449,) of which the following is a specification.

This invention relates to improvements in gas-engines, and especially to the valve-gear for controlling the admission of gas and air and the escape of spent gases and the valvegear for controlling the igniting mechanism.

The invention consists in the construction and combination of parts and details, as will be fully described and set forth hereinafter,

'and pointed out in the claims.

In the accompanying drawings, Figure 1 is a vertical longitudinal sectional View of my improved valve-gear, parts being broken out. Fig. 1 is a vertical longitudinal sectional view of parts of the valve'gear. Fig. 2 is a vertical longitudinal sectional view of part of the shaft carrying the cams of the air and gas mixing valve-gear and a sectional view of parts acted upon by said cams. Fig. 3 is a similar view of a modification. Fig. 3 is a side view of the cam and roller of the igniting-valve gear. Fig. 4 is a side view of the upper end of the rod carrying the rollers and of the shifting mechanism. Fig. 5 is a top view of the same; Fig. 6, a vertical longitudinal sectional view of the i gniting-valves, showing the parts in position the reverse of those they have in Fig. 1. Figs. 7, S, 9, 10, 11,12, and 13 are detail views of parts of the igniting mechanism. Fig. 14 is a sectional plan view on the line a: :0, Fig. 6; and Fig. 15 is a vertical longitudinal sectional elevation through the shaft carrying the cams for the gas and air mixing and igniting valve gear and of the shafts and rollers acted upon by said cams.

Similar letters of reference indicate corresponding parts.

The gas and air mixing and the igniting valves are all in communication with thecasing H,which in turn is connected with the cylinder by a channel I. The igniting de vice consists of a casing A, containing two plungers or pistons h 7t, which work in corresponding bores that are connected by the channel I), which may have any desired crosssection and position. The piston 71 is provided at its lower end with a neck h, the top of which is beveled, and said neck is provided with fine pressure-reducing channels 13 Above the neck h the piston 71 is provided with an annular recess 2), to which the channels Z2 lead. The piston 72. is beveled at its lower end to fitsnugly on the correspondingly-shaped lower end of the bore for receiving it, and the lower end of the bore for the piston 7b3 is in communication with the channel b which leads to the burner 1 as shown in dotted lines in Fig. 6.

The casing E contains the gas, air, and exhaust valves. The channel e serves to conduct the fresh air to the mixing-chamber, as also to conduct out the exhaust-gases. For the purpose of preventing too much exhaustgases and too small a quantity of fresh air from passing into the Working cylinder, whereby the effectiveness of the motor would be reduced, the double valve G G has been provided. hen the piston descends and forces out the spent gases, the valve G is pressed against its seat and the valve G is moved from its seat, thus permitting the spent gases to pass out through the channel H as indicated by the arrows in Fig. 1, said channels meeting in the channel e", through which they are conducted to the outer air. hen the piston of the workingcylinder rises, the channels II are closed by the valve G, which is held against its seat, and at the same time the valve G is opened or moved from the seat, as both valves G and G are on the same stem G, thus permitting the fresh air to enter through the channel 6 into the channel e. The gas is conducted through a suitable pipe into the chamber cl, having the outlet channels or ports 61-, which are closed by the conical valve f. The stem of the valve f is made tubular and serves as a guide for the stem or rod g of a valve 9, fitting against the valve-seat 9 A spring f surrounding the neck in which the stern of the valve f slides, acts on a plate f on the upper end of the stem of the valve f, and thus presses said valve upward and against its seat. A spring (1, surrounding the stem g of the valve g,

rests on the plate f and bears against a plate 9 on the upper end of the stem thereby pressing said valve-stem upward. A rod t, provided with a fork at its upper end, is guided in a tubular easing K, and is surrounded within said casing by a spring F, bearing against a collar Zof the rod 2', and thus pressing the rod 2' upward, and also pressing a roller n on a pin p in the forked end of said rod '11 against a cam m, rigidly mounted on the shaft 10. Said cam m is provided with a projection q and with a recess a. Adjacent to the cam m a roller 0 is mounted on the pin p in the forked end of the rod 1' in such a manner that it can be shifted laterally by means of a forked lever 0 which is operated by any well-known form of governor. WVhen the engine runs at the ordinary rate of speed, the roller 0 has no function; but as soon as the speed increases the roller 0 is moved by any well-known governor and by means of the fork 0 into such position that it will be under the eccentric disk r on the shaft 10. At the moment that the projection q leaves the roller m, the roller 0, by the action of the eccentric disk 0", is pressed downward, and the arm S on the rod t' presses on the upper end of the stem g of the valve g and keeps the valve 9 open.

In place of the device above described the construction shown in Fig. 3 may be used, in which an angle-piece a; is supplied on the flywheel, and the operation of this construction is as follows: As soon as the speed increases the roller 0 is shiftedat the time when the proj ection q begins to act on the roller 71, and thereby the roller 0 is brought under the angle-piece When the project-ion (1 leaves the roller n, the spring f has the tendency to press the rod 01 upward. The angle-piece 0: acts on the roller and thereby keeps the valve g open. A lever t, having two arms of equal length, is mounted to rock on the shaft 4; and has one end rested on the plate f on the upper end of the stem of the gas-valve f, and the other end of said lever t rests upon a nut 7; on the lower end of the rod 6. WVhen the recessed part 10 of the cam m runs on the roller 02, the spring F presses the rod 1'- upward. and the nut 7t" moves one end of the levert upward while the other end is pressed downward, and, acting on the plate f on the upper end of the stem of the valve f, presses said valve-stem downward, whereby the channels (1' are opened, so as to permit the gas to pass from the chamber d through said channels 61' into the casing E. The descending valve f presses on the shoulder h of the valve-stem g and thus the valve g is also opened. A mixture of certain proportions.of gas and air is thus produced, which is drawn into the mixing and igniting chamber by the upward movement of the piston. As soon as the recessed part a of the cam m leaves the roller 0 the valves f and g are closed as the rod 1' is pressed down, permitting the spring f acting on the plate f, to move the valve f upward and close the ports (1'. The pistons h and h are operated by a lever t, pivoted on the lower end of the link h, having its upper end held in a recessed block k held adjustably by the nuts k on the lower screw-threaded end of a rod 7c, projecting downward from the lower end of a rod c", having its upper end forked. In said forked upper end of the rod 7; a pin 1) is held, on which is mounted a roller 07., on which "can act a cam m, mounted on the shaft 00 and provided with a recess q. A spring F, contained within a cylindrical guide-easing K, surrounding the rod i, acts on a collar Z of the rod 1" and presses said rod e" upward. The lever i is forked at both ends, and one of said ends embraces the recessed upper end of the piston 7L3, above which recessed upper end a head is formed. Into the opposite forked end of the lever 25 a sleeve 0 is placed, which surrounds the upper recessed end of the piston 7L2, which sleeve is held in place by nuts 0 and c screwed on said upper recessed end of the piston k After the explosion has taken place, the projection q of the cam m, acting on the roller n, presses down the rod 'i, and the arm 8 of said rod acts on the stem of the valve g and lowers said valve, so as to permit the spent gases of the explosion to escape. Then fresh air and gas are again admitted, and so on.

As the hot spent gases of the explosion are immediately forced out of the casing E and fresh cool air is drawn in, the parts, especially the valves f and g, are always kept cool, thus doing away with the expensive watercooling devices used heretofore.

The igniting device operates as follows: WVhen the parts are in the position shown in Fig. 6, the compressed mixture of gas and air passes under reduced pressure through the small channels 19 into the annular groove b in the piston 7L2 and through the channel I) and b to the burner 3 the piston h being raised. As soon as this mixture of gas has been ignited the piston 7&3 is lowered, as is also the piston 7L2, thus permitting the flame of the ignited mixture in the channel I) to ig nite the mixture of gas and air in the igniting-chamber. WVheu the rod t" descendsfithe piston 7L3 is pressed downuntil its bottom strikes the bottom of the bore of said cylinder. The continued pressure on the lever 25 forces down the piston 71, for the reason that the piston 7L3 can go no farther and forms a fulcrum for the lever t. The cam m continues to revolve, and when its recess 9 is at the bottom, as shown in Fi 3, the expanding spring F presses the rod 1} upward. The link h acts on the lever 75, which raises the piston 7L2 until its bottom head h strikes against the seat in the bottom of the casing A, thus preventing said piston h2 from moving upward any farther. The other end of the lever t is now moved upward and raises the piston 7L3 sufficiently to establish communication between the channels I) and b The nuts 7c and k above the cap or head k are provided for the purpose of adjusting said head and the link h, so as to cause an early or later explosion of the gas and air. 7

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In a gas-engine, the combination of the casing A, having the bores for the pistons h and it the channel 1), connecting said bores, and the channel 12 leading to the burner, and the pistons 7L2 and it the piston 713 being provided with an annular groove 6, substantially as set forth.

2. The combination, with the casing E, of a valve g, having a stem y the gas-valve f, the arm S, acting on the stern of the valve g, a lever t, acting on the gas-valve f, the rod 2', connecting with said arm S, a lever t, and a cam and a roller for operating the rod 1', substantially as set forth.

3. The combination, with the casing H, havin g the channels H E, of the sliding stem D and the valves G G on the opposite ends of the same, substantially as set forth.

4. In a gas-engine, the combination, with a casing, of a valve in the same governing the admission of the mixture of gas and air to the cylinder, a stem on said valve, an arm acting on said stem, a rod to which said arm is secured, two rollers on the opposite end of said arm, one of the rollers being adjustable, a cam acting on the non-adjustable roller, and a cam acting on the adjustable roller, substantially as set forth.

5. In a gas-engine, the combination, with a casing, of a valve controlling the passage of the mixture of gas and air to the cylinder, a stem to which said valve is secured, a gasvalve having a tubular stem surrounding the stem of the valve that controls the admission of the mixture of gas and air to the cylinder, a pivoted lever acting on the upper end of the gas-valve, an arm acting on the upperendof the stem of the valve governing the admission of the mixture of gas and air to the cylinder, a rod to which said arm is secured, a projection or nut in said rod acting on the lever that rests on the gas-valve, a roller on the upper end of said rod, and a cam acting on said roller, substantially as set forth.

6. The combination, with a casing, of the valve G, governing the passage of the mixture of gas and air to the cylinder, the stem 9 a gas-valve f, having a tubular stem surrounding the stem g a spring f pressing the gasvalve upward, the spring 9 surrounding the stem g and pressing said stem upward, a pivoted lever acting on the upper end of the gasvalve, the arm S, acting on the upper end of the stem 9 the rod 1', from which the arm S projects, the nut 70 on said rod acting on the lever t, and a cam for actuating the rod t, substantially as set forth.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

JULIUS lllATTI-IIES.

\Vi tnesses FRANZ GOTTSCHALK, ROBERT LINDEMANN, 

